Wiring through the firewall

    I believe the monte carlo and lumina are similar, but I am trying to send a wire from my battery thorugh the firewall into the interior of my car. I have a 98 Lumina. I have no idea how to do this and after looking around for about 15 minutes I couldn't find any opening to send the wire through. Any ideas?

pull the carpet back just tho the right side of the center console you should see a black rubber plug...this is where the wireing harness comes thru, either slide it thru here or drill a new hole, just remeber to plug the hole so you don get wet..
 
there is more then one hole thru the firewall, but this is prolly the biggest one
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